Malicious PDF — malware analysis report

Static analysis result for SHA-256 4319f189dc147099…

MALICIOUS

PDF

80.7 KB Created: 2021-09-20 02:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f0fe0ebd0ef93311e2f7804b4119968 SHA-1: f35672da1aff6223dfddddc11fa031fb658b86dd SHA-256: 4319f189dc147099c256aff6fda09634dd169fe88965018b29a6adbcef720eb3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is part of a link farm, and the ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to a series of URLs, as evidenced by the numerous unknown reputation URLs extracted, potentially leading to phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/7122419b1a12efc2c8d2587981c41297/29854822894.pdf
    • http://tech-in.info/bramy/userfiles/file/15683656777.pdf
    • https://agrocare.ro/ckfinder/userfiles/files/30227576163.pdf
    • http://fabiocaronearchitetto.com/userfiles/files/67070862842.pdf
    • http://lexxyin.net/files/fckeditor/file/tidoladirivomuwelojuviwe.pdf
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/jotov.pdf
    • https://washlounge.in/ckfinder/userfiles/files/2605963569.pdf
    • https://elpollopaulino.com/cenavarra_userfiles/files/xedejanilikisarepum.pdf
    • http://www.insight-assessment.com/ckfinder/userfiles/files/2315697708.pdf
    • http://codemessaging.net/ckfinder/userfiles/files/vesaturapekaletobi.pdf
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcd5716305---66197803680.pdf
    • http://aktien-analyse.de/images/File/45335644382.pdf
    • https://detskeihriska.eu/ckfinder/userfiles/files/38953491150.pdf
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/wibomo.pdf
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/58212719509.pdf
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/wefuzujomudotel.pdf
    • http://topp.pl/_topp/file/vadok.pdf
    • https://bgg.pirkitpadangas.lt/ckfinder/userfiles/files/rafizubazugeg.pdf
    • http://dentalcenterstudio.it/userfiles/files/nebaxewugakoxozal.pdf
    • https://hotararicedo.ro/files/files/484210225.pdf
    • http://www.supair-lux.hu/ckfinder/userfiles/files/sonebokosinipusov.pdf
    • https://eltonltd.ru/sites/default/files/uploads/roraneroziputopawuti.pdf
    • http://wangyiphk.com/userfiles/lapusavidemegamidezu.pdf
    • https://hijaulumut.com/contents/files/bonowisujut.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=android+voip+push
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000daaf.bin
7a03787fb3902597d5510dc4abfccc39e98f87b49907b094f028247efe042330		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAF 10196 bytes
font_01_sfnt_off0000f167.bin
60680cc623952c9f83696852060860844341d862edc0ab788ebbdf2e99705466		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF167 16828 bytes
font_02_sfnt_off00011cff.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFF 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.